20495800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{7883}}^1$

素因数の和:7912

約数の個数: 48

約数和(自身を含む): 51324840

約数和(自身を除く): 30829040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 7883, 15766, 31532, 39415, 63064, 78830, 102479, 157660, 197075, 204958, 315320, 394150, 409916, 512395, 788300, 819832, 1024790, 1576600, 2049580, 2561975, 4099160, 5123950, 10247900, 20495800]

約数ペア:

[(1, 20495800), (2, 10247900), (4, 5123950), (5, 4099160), (8, 2561975), (10, 2049580), (13, 1576600), (20, 1024790), (25, 819832), (26, 788300), (40, 512395), (50, 409916), (52, 394150), (65, 315320), (100, 204958), (104, 197075), (130, 157660), (200, 102479), (260, 78830), (325, 63064), (520, 39415), (650, 31532), (1300, 15766), (2600, 7883)]